CN102003525A

CN102003525A - Control device for automatic transmission

Info

Publication number: CN102003525A
Application number: CN2010102603344A
Authority: CN
Inventors: 山田直弘
Original assignee: JATCO Ltd
Current assignee: Nissan Motor Co Ltd
Priority date: 2009-09-02
Filing date: 2010-08-20
Publication date: 2011-04-06
Anticipated expiration: 2030-08-20
Also published as: CN102003525B; US20110054755A1; EP2292949A1; JP4951658B2; US8326508B2; KR20110025127A; KR101707688B1; EP2292949B1; JP2011052757A

Abstract

The invention provides a control device for automatic transmission, which reduces fuel consumption and prevents vibration. The control device includes a speed detecting device for detecting the vehicle speed; a storing device for determining a determination reference that a lockup clutch LUC of a torque converter TC is in an engaged condition or a disengaged condition; a determining unit determines that a friction element is to be set in an engaged condition in case a vehicle speed is equal to or higher than a determination reference and determining that the friction element is to be set in a disengaged condition in case the vehicle speed is lower than the determination reference, and a engagement control unit that performs control to engage or disengage the friction element on the basis of a determination result of the determining unit, wherein the engagement control unit comprises a prohibiting unit that prohibits setting of the friction element in the engaged condition until a predetermined condition is established, regardless of the determination result, after the friction element has been modified from the engaged condition to the disengaged condition.

Description

The control gear of automatic transmission

Technical field

The present invention relates to control the control gear of automatic transmission of coupled situation of the lock-up clutch of hydraulic pitch device.

Background technique

The hydraulic pitch device that carries on the speed changer possesses the lock-up clutch as friction element, and this speed changer is equipped on the vehicle.By setting lock-up clutch is coupled situation, suppresses the deviation of the I/O rotating speed of hydraulic pitch device, reduces the fuel consume of motor.

As such hydraulic pitch device, disclose the locking control gear of following liquid joiner, promptly by with fluid coupling from transition state when lockup state switches decision content and be set at from the decision content of lockup state when transition state is switched and have hysteresis region, thereby, prevent and suppress to adjust disorderly vibration (hunting) (with reference to patent documentation 1).

Patent documentation 1:(Japan) spy opens flat 08-028678 communique

In above-mentioned prior art, by at the decision content (for example speed of a motor vehicle) that connects lock-up clutch with discharge to set between the decision content of lock-up clutch and lag behind, prevent by the connection of lock-up clutch, discharge the vibration that adjusts disorderly that causes.

Usually, in order to prevent descend cause flame-out and guarantee the lowest capacity that the discharge of oil pump is pressed of engine speed, the lower limit (second speed of a motor vehicle) of the decision content (for example speed of a motor vehicle) that lock-up clutch discharges is judged in decision.Therefore,, discharge second speed of a motor vehicle of lock-up clutch relatively, set first speed of a motor vehicle that connects lock-up clutch high setting under the situation about lagging behind in order to prevent to adjust disorderly vibration.

When setting hysteresis in this wise, the amount of corresponding hysteresis can be cut down in the zone that connects lock-up clutch.

On the other hand, when eliminating hysteresis, the decision content that connects lock-up clutch is made as when identical with the decision content that discharges lock-up clutch, the attachment areas of lock-up clutch enlarges, and reduces fuel consume.Yet, when such setting, can not suppress to adjust disorderly the generation of vibration.

Like this, the fuel consumption rate that the control of lock-up clutch causes is vibrated the relation that becomes compromise selection (trade-off comprehensively adjusts) with adjusting disorderly, and is difficult to realize simultaneously both.

Summary of the invention

The present invention proposes in view of described problem, and its purpose is to provide the control gear that can realize reducing fuel consume and prevent to adjust disorderly vibration takes place the two automatic transmission.

The control gear of the automatic transmission of one embodiment of the present invention, based on the speed of a motor vehicle and engine load target setting speed change level, possess hydraulic pitch device in described automatic transmission, the control gear of described automatic transmission possesses: vehicle speed detector device, and it detects the speed of a motor vehicle; Storage device, its storage judges that the friction element of the described hydraulic pitch device of locking is that coupled situation still is the determinating reference of releasing state; Decision maker, it is to judge under the situation more than the described determinating reference that described friction element is a coupled situation in the described speed of a motor vehicle, judges that under the situation of the not enough described determinating reference of the described speed of a motor vehicle described friction element is releasing state; Connect control gear, its result of determination based on described decision maker connects or discharges the control of described friction element, described connection control gear has inhibiting apparatus, with described friction element after coupled situation controls to releasing state, regardless of described result of determination, before rated condition was set up, this inhibiting apparatus forbade that described friction element is a coupled situation.

According to the present invention because according to the speed of a motor vehicle be more than the determinating reference still deficiency decide connection still to discharge lock-up clutch, so, enlarge attachment areas by the delay of not setting determinating reference, reduce fuel consume.And, before setting up, forbid being set at coupled situation in rated condition, prevent to adjust disorderly the generation of vibration.

Description of drawings

Fig. 1 is outline figure and system's pie graph of formation one example of the automatic transmission of expression first embodiment of the invention;

Fig. 2 is the explanatory drawing of oil hydraulic circuit of the control valve unit of first embodiment of the invention;

Fig. 3 is the explanatory drawing of the connection action schedule of first embodiment of the invention;

Fig. 4 is the explanatory drawing of operating state of the solenoid valve of first embodiment of the invention;

Fig. 5 is the explanatory drawing of the speed change figure of first embodiment of the invention;

Fig. 6 is the flow chart that the ATCU of first embodiment of the invention carries out the control of lock-up clutch;

Fig. 7 is the time diagram that the ATCU of first embodiment of the invention carries out the control of lock-up clutch;

Fig. 8 is the flow chart that the ATCU of second embodiment of the invention carries out the control of lock-up clutch;

Fig. 9 is the time diagram that the ATCU of second embodiment of the invention carries out the control of lock-up clutch.

Description of reference numerals

1, accelerator open degree sensor (accelerator open degree detection device)

1a, engine load sensor

2, engine rotation speed sensor

3,4, turbine speed sensor

5, OSS

10, engine controller (ECU)

20, automatic transmission controller (ATCU, storage device, decision maker, connection control gear, inhibiting apparatus)

Eg, motor

LUC, lock-up clutch (friction element)

TC, fluid torque converter

OP, oil pump

Embodiment

Below, describe with reference to the control gear of accompanying drawing the automatic transmission of embodiment of the present invention.

(first mode of execution)

Fig. 1 is outline figure and system's pie graph of formation one example of the automatic transmission of expression first embodiment of the invention.

The automatic transmission of present embodiment is to have advance 7 speed and the automobile-use speed changer that retreats the speed change level of 1 speed, and the fluid torque converter through possessing lock-up clutch LUC is connected with the motor Eg of vehicle.Be delivered to pump impeller and the oil pump OP of fluid torque converter TC from the rotation of motor output, the oil that the rotation by this pump impeller is stirred is delivered to turbine wheel through stator, drives input shaft Input.

In addition, be provided with the automatic transmission controller (ATCU) 20 of the engine controller (ECU) 10 of the drive condition of control motor Eg, the speed change state of control automatic transmission etc. at not shown vehicle, carry out the control valve unit CVU of the oil pressure control of clutch, break etc. based on the output signal of ATCU20.In addition, ECU10 is connected through CAN order wire etc. with ATCU20, by mutual share sensor information and the control information of communicating by letter.

ECU10 will detect the engine load sensor 1a of throttle opening TVO of driver's the accelerator open degree sensor 1 of accelerator pedal operation amount (gas pedal aperture) APO and detection of engine and the engine rotation speed sensor 2 of detection of engine rotating speed is connected.ECU10 is based on engine speed and gas pedal aperture APO control fuel injection amount and throttle opening, thus control engine speed and engine torque.

ATCU20 is connected the OSS 5 of second turbine speed sensor 4 of first turbine speed sensor 3 of the rotating speed of the detection first planetary carrier PC1 described later and the rotating speed that detects the first gear ring R1 and the rotating speed that detects output shaft Output and the Circuit breaker 6 of the speed change lever serviceability that detects the driver.In addition, the speed change lever engine braking gear that except that P, R, N, D, also possesses engine braking generation effect put with engine braking do not produce effect advance usually and drive gear and put.

ATCU20 possesses the rotating speed operational part of the rotating speed of computing input shaft Input, just often, based on vehicle velocity V sp and throttle opening TVO or gas pedal aperture APO, set optimum target shift speed level from the speed change figure that advances 7 speed described later, and realize the control command of target shift speed level to control valve unit CVU output.

In addition, the lock-up clutch LUV that fluid torque converter TC is set in ATCU20 control is that coupled situation still is releasing state, and exports this control command to control valve unit CVU.

(formation of automatic transmission)

Below, the formation of automatic transmission is described.

Axially towards output shaft Output side, planetary gears is arranged from input shaft Input side according to the arranged in order of the first planetary gear set GS1, the second planetary gear set GS2.In addition, dispose a plurality of clutch C1, C2, C3 and break B1, B2, B3, B4, and dispose a plurality of overrunning clutch F1, F2.

The first planetary gear set GS1 possesses 2 planetary pinion G1, G2 and constitutes.Wherein, the first planetary pinion G1 as possess the first sun gear S1, the first gear ring R1, with the first small gear P1 of two gear S1, R1 engagement, support above-mentioned first small gear P1 rotation the first planetary carrier PC1 single pinion type planetary pinion and constitute.

In addition, the second planetary pinion G2 also for have secondary sun wheel S2, the second gear ring R2, with the second small gear P2 of two gear S2, R2 engagement, support single pinion type planetary pinion of the second planetary carrier PC2 of above-mentioned second small gear P2 rotation.

In addition, the second planetary gear set GS2 possesses two planetary pinion G3, G4 and constitutes.Wherein, the third line star gear G3 as have the 3rd sun gear S3, the 3rd gear ring R3, with the third pinion P3 of two gear S3, R3 engagement, support above-mentioned third pinion P3 rotation the third line gear rack PC3 single pinion type planetary pinion and constitute.

In addition, fourth line star gear G4 is also identical with first～the 3rd gear train, for have the 4th sun gear S4, the 4th gear ring R4, with the fourth pinion P4 of two gear S4, R4 engagement, support single pinion type planetary pinion of the fourth line gear rack PC4 of above-mentioned fourth pinion P4 rotation.

Input shaft Input is linked to the second gear ring R2, is input to the second gear ring R2 from the rotary driving force of motor Eg through fluid torque converter TC etc.

On the other hand, output shaft Output is connected in the third line gear rack PC3, and the output rotary driving force is delivered to driving wheel through not shown extreme gear.

But it is one that the first gear ring R1 and the second planetary carrier PC2 and the 4th gear ring R4 link by the first linking member M1.In addition, it is one that the 3rd gear ring R3 and fourth line gear rack PC4 link by the second linking member M2, and this second linking member M2 is connected in the input shaft Input and the second gear ring R2 through clutch C1.

In addition, the first sun gear S1 and secondary sun wheel S2 are one by the 3rd linking member M3 binding.

Therefore, the first planetary gear set GS1 is made of 4 rotatable members to link the first planetary pinion G1 and the second planetary pinion G2 by the first linking member M1 and the 3rd linking member M3.In addition, the second planetary gear set GS2 is made of 5 rotatable members to link the third line star gear G3 and fourth line star gear G4 by the second linking member M2.

The first planetary gear set GS1 has the torque input path that is input to the second gear ring R2 from input shaft Input, and the torque that is input to the first planetary gear set GS1 outputs to the second planetary gear set GS2 from the first linking member M1.

In addition, the second planetary gear set GS2 has from input shaft Input and is input to the torque input path of the second linking member M2 and is input to the torque input path of the 4th gear ring R4 from the first linking member M1, and the torque that is input to the second planetary gear set GS2 outputs to output shaft Output from the third line gear rack PC3.

At this, the input clutch C1 among various clutch C1～C3 is for selectively disconnecting, connect the clutch of the input shaft Input and the second linking member M2.In addition, direct clutch C2 is for selectively disconnecting, connect the clutch of the 4th sun gear S4 and fourth line gear rack PC4.

In addition, H﹠amp; LR clutch C3 is for selectively disconnecting, connect the clutch of the 3rd sun gear S3 and the 4th sun gear S4.In addition, between the 3rd sun gear S3 and the 4th sun gear S4, dispose only permission and rotate relatively, the second overrunning clutch F2 of the rotation that becomes one round about to a direction.

In addition, H﹠amp; LR clutch C3 is released, and when rotating ratio the 3rd sun gear S3 of the 4th sun gear S4 is big, independently rotating speed of the 3rd sun gear S3 and the 4th sun gear S4 takes place.Therefore, the third line star gear G3 and the formation of fourth line star gear G4 for being connected through the second linking member M2, and each planetary pinion is realized independently gear ratio.

In addition, the break that stops for the rotation that optionally makes the first planetary carrier PC1 of the front brake B1 among various break B1～B4.In addition and front brake B1 dispose the first overrunning clutch F1 side by side.

In addition, the break that stops for the rotation that optionally makes the 3rd sun gear S3 of low brake B2.In addition, 2346 break B3 are breaks that the rotation of the 3rd linking member M3 (the first sun gear S1 and secondary sun wheel S2) is stopped.In addition, reversing break B4 is the break that the rotation of fourth line gear rack PC4 is stopped.

(secondary speed computing)

Input shaft Input is linked to the second gear ring R2, and, the first planetary pinion G1 and the second planetary pinion G2 constitute the first planetary gear set GS1 that links 2 rotatable members, and the rotating speed operational part in establishing ATCU20 uses 2

turbine speed sensors

3,4 to detect the rotating speed of input shaft Input by calculating.

At this, first turbine speed sensor 3 detects the rotating speed of the second planetary carrier PC2, second turbine speed sensor 4 detect be linked to the first planetary carrier PC1 as the rotating speed of turbine sensor with the sensor usefulness portion material 63 of member.

And, if the rotating speed of the first planetary carrier PC1 is the rotating speed of N (PC), the second planetary carrier PC2 is that N (PC2), the second gear ring R2 are that rotating speed is that the gear ratio of N (R2), the second gear ring R2 and the second planetary carrier PC2 (the first gear ring R1) is 1, the gear of the first gear ring R1 (the second planetary carrier PC2) and the first planetary carrier PC1 is than being β, by following formula can the computing second gear ring R2 rotational speed N (R2).

N(R2)＝(1+1/β)·N(PC2)-(1/β)·N(PC1)

Thus, can in the hope of the rotating speed of the second gear ring R2 (input shaft Input) promptly, secondary speed.

(formation of control valve unit)

Then, utilize Fig. 2 that the oil hydraulic circuit of control valve unit CVU is described.

In this oil hydraulic circuit, be provided with: the oil pump OP that drives by motor Eg as oil pressure source, with driver's speed change lever operation interlock and switch the oil circuit of supplying with the main PL of pressure manually operated valve MV, will lead the pilot valve PV of a level pressure of pressing the regulation that reduces pressure.

In addition, be provided with in oil hydraulic circuit: the first pressure regulator valve CV1 of the connection pressure of adjusting low brake B2, the second pressure regulator valve CV2 that regulates the connection pressure of input clutch C1, the 3rd pressure regulator valve CV3 that regulates the connection pressure of front brake B1, adjusting H﹠amp; The 6th pressure regulator valve CV6 that the connection of the 4th pressure regulator valve CV4 that the connection of RL clutch C3 is pressed, the 5th pressure regulator valve CV5 that regulates the connection pressure of 2346 break B3, adjusting direct clutch C2 is pressed.

In addition, in oil hydraulic circuit, be provided with: low brake B2 and input clutch C1 respectively supplied with oil circuit 150a, switch to the first switching valve SV1 of the state that only is communicated with a side among the 150b, the supply oil circuit that the D shelves are pressed and the R shelves are pressed is switched to the second switching valve SV2 of the state that only is communicated with a side with respect to direct clutch C2, the oil pressure that to supply with to reversing break B4 is from the supply oil pressure of the 6th pressure regulator valve CV6 and the 3rd switching valve SV3 that switches between the supply oil pressure that the R shelves are pressed, the 4th switching valve SV4 that will between oil circuit 123 and oil circuit 122, switch from the oil pressure of the 6th pressure regulator valve CV6 output.

In addition, be provided with in oil hydraulic circuit: based on control signal, to the first solenoid valve SOL1 of first pressure regulator valve CV1 output pressure regulation signal from automatic transmission controller unit 20, the second solenoid valve SOL2 to second pressure regulator valve CV2 output pressure regulation signal, the 3rd solenoid valve SOL3 to the 3rd pressure regulator valve CV3 output pressure regulation signal, the 4th solenoid valve SOL4 to the 4th pressure regulator valve CV4 output pressure regulation signal, the 5th solenoid valve SOL5 to the 5th pressure regulator valve CV5 output pressure regulation signal, the 6th solenoid valve SOL6 to the 6th pressure regulator valve CV6 output pressure regulation signal, the 7th solenoid valve SOL7 to the 3rd switching valve SV3 and the 4th switching valve SV output switching signal.

Above-mentioned each solenoid valve SOL2, SOL5, SOL6 are the threeway proportional electromagnetic valve with 3 mouths, and first mouthful imports first pilot described later, and second mouthful is connected in the discharging oil circuit, the 3rd mouthful of compression zone that is connected to pressure regulator valve or switching valve.In addition, solenoid valve SOL1, SOL3, SOL4 are two logical proportional electromagnetic valves with 2 mouths, and solenoid valve SOL7 is the three-way cock solenoid valve with 3 mouths.

In addition, the first solenoid valve SOL1 and the 3rd solenoid valve SOL3 and the 7th solenoid valve SOL7 are the solenoid valves of normal close type (at the state of non-closed in electrified state).On the other hand, the second solenoid valve SOL2 and the 4th solenoid valve SOL4 and the 5th solenoid valve SOL5 and the 6th solenoid valve SOL6 are the solenoid valves of open type (state of opening during non-energising).

(oil circuit formation)

Discharge by engine-driven oil pump OP is pressed and is adjusted to after main the pressure, supplies to oil circuit 101 and oil circuit 102.Be connected with at oil circuit 101: oil circuit 101b, the supply H﹠amp of the initial pressure that the oil circuit 101a that is connected with manually operated valve MV with the action of driver's shift level operations linkage, the connection of supplying with front brake B1 are pressed; The oil circuit 101c of the initial pressure that the connection of LR clutch C3 is pressed.

Connect oil circuit 105 and supply with at manually operated valve MV at the oil circuit 106 that retreats the R shelves pressure of selecting when travelling, according to shift level operation switching oil circuit 105 and oil circuit 106.

Be connected with at oil circuit 105: the oil circuit 105e of the switching pressure of oil circuit 105d, the supply second switching valve SV2 described later of the initial pressure of the oil circuit 105c of the initial pressure of the connection pressure of oil circuit 105b, the supply 2346 break B3 of the initial pressure of the connection pressure of the oil circuit 105a of the initial pressure of the connection pressure of supply low brake B2, supply input clutch C1, the connection pressure of supply direct clutch C2.

Be connected with at oil circuit 106: the oil circuit 106b of the initial pressure that the connection of supply with oil circuit 106a that the switching of the second switching valve SV2 presses, supplying with direct clutch C2 is pressed, supply with the supply oil circuit 106c that the connection of reversing break B4 is pressed.

Be connected with the oil circuit 103 of supplying with first pilot through pilot valve PV at oil circuit 102.Be provided with at oil circuit 103: to the first solenoid valve SOL1 supply with first pilot oil circuit 103a, to the second solenoid valve SOL2 supply with first pilot oil circuit 103b, to the 3rd solenoid valve SOL3 supply with first pilot oil circuit 103c, to the 4th solenoid valve SOL4 supply with first pilot oil circuit 103d, to the 5th solenoid valve SOL5 supply with first pilot oil circuit 103e, supply with the oil circuit 103f of first pilot, supply with the oil circuit 103g of first pilot to the 7th solenoid valve SOL7 to the 6th solenoid valve SOL6.

Constitute such oil hydraulic circuit,, can switch engaging and the release of each clutch C1～C3 and break B1～B4 by controlling various solenoid valves respectively.

And shown in the connection action schedule of Fig. 3, the connection (symbol zero) by suitably making up each clutch C1～C3 and break B1～B4 and discharge (no symbol), retreats each speed change level of 1 speed at 7 speed that can realize advancing.

(chronotropic action)

(1 speed)

1 speed is to do at engine braking that time spent (the engine braking gear is put in the selection) and engine braking are non-does time spent (advance usually travel gear put in the selection) different clutch or break effects.Shown in (zero) among Fig. 3, engine braking is done the time spent by front brake B1 and low brake B2 and H﹠amp; The connection of LR clutch C3 obtains.In addition, the first overrunning clutch F1 that is set up in parallel at front brake B1 and and H﹠amp; The second overrunning clutch F2 that LR clutch C3 is set up in parallel also participates in transmission of torque.The non-work of engine braking discharges front brake B1 and H﹠amp the time spent; LR clutch C3 only connects low brake B2, by the first overrunning clutch F1 and the second overrunning clutch F2 transmitting torque.

In this 1 speed, because be connected with front brake B1 (connecting by the first overrunning clutch F1 during the non-action of engine braking), so the rotation that is input to the second gear ring R2 from input shaft Input is decelerated by the first planetary gear set GS1.The rotation of this deceleration outputs to the 4th gear ring R4 from the first linking member M1.In addition, be H﹠amp because be connected with low brake B2; LR clutch C3 (connecting by the low brake B2 and the second overrunning clutch F2 during the non-action of engine braking) so the rotation that is input to the 4th gear ring R4 is decelerated by second planetary gear system, exports from the third line gear rack PC3.

In this 1 speed, torque is in front brake B1 (the perhaps first overrunning clutch F1), low brake B2, H﹠amp; RL clutch C3 (the second overrunning clutch F2), the first linking member M1, the second linking member M2, the 3rd linking member M3.That is, the first planetary gear set GS1 and the second planetary gear set GS2 participate in transmission of torque.

At this moment, shown in the solenoid valve action schedule of Fig. 4, being connection (ON) by first～the 3rd solenoid valve SOL1～SOL3 and the 6th and the 7th solenoid valve SOL6, SOL7 are set, in addition is by (OFF), supplies with the connection pressure to the clutch or the break of expectation.

At this, because the 7th solenoid valve SOL7 is set to connect,, the first pressure regulator valve CV1 and low brake B2 are communicated with so the first switching valve SV1 moves along left and right directions among Fig. 2, input clutch C1 is connected (preventing linkage status) with floss hole.In addition, because of acting on four-hole c4 left in Fig. 2, D shelves pressure moves, because first mouthful of c1 and the 3rd mouthful of c3 are communicated with, so the 6th pressure regulator valve CV6 effect D shelves are pressed at the second switching valve SV2.Because the 6th pressure regulator valve CV6 moves below in Fig. 2, so, do not supply with D shelves pressure at direct clutch C2 and the 4th switching valve SV4.

In addition, effect right-hand moving in Fig. 2 that the 4th switching valve SV4 presses by the D shelves becomes the state that is communicated with oil circuit 121 and oil circuit 123, but irrelevant with anastomosis.In addition, at the 3rd switching valve SV3 because from the 7th solenoid valve SOL7 to mouth d4 supply with signal pressure so to Fig. 2 left move because the oil circuit 122 that first mouthful of d1 and the 3rd mouthful of d3 are communicated with is not supplied with oil pressure, so do not supply with oil pressure to reversing break B4.

(2 speed)

2 speed are that engine braking is made non-time spent (advance usually travel gear put in the selection) different clutch or the breaks of doing of time spent (the engine braking gear is put in the selection) and engine braking and connected.Shown in (zero) among Fig. 3, engine braking is done the time spent by low brake B2 and 2346 break B3 and H﹠amp; The connection of LR clutch C3 can obtain.In addition, with H﹠amp; The second overrunning clutch F2 that LR clutch C3 is set up in parallel also participates in transmission of torque.Non-time spent, the H﹠amp of doing of engine braking; LR clutch C3 discharges, and low brake B2 and 2346 break B3 connect, by the second overrunning clutch F2 transmitting torque.

In this 2 speed, because be connected with 2346 break B3, so the rotation that is input to the second gear ring R2 from input shaft Input is only slowed down by the second planetary pinion G2.The rotation of this deceleration outputs to the 4th gear ring R4 from the first linking member M1.In addition, because connect low brake B2 and H﹠amp; LR clutch C3 (connecting by the second overrunning clutch F2 during the non-action of engine braking) is so the rotation that is input to the 4th gear ring R4 is slowed down by second planetary gear system, exports from the third line gear rack PC3.

In this 2 speed, torque is in 2346 break B3, low brake B2, H﹠amp; RL clutch C3 (the perhaps second overrunning clutch F2), the first linking member M1, the second linking member M2, the 3rd linking member M3.That is, the second planetary pinion G2 and the second planetary gear set GS2 participate in transmission of torque.

In addition, when 2 speed upgrade, by early release front brake B1 and begin to connect 2346 break B3, discharge the first overrunning clutch F1 from 1 speed in the moment of the connection capacity of guaranteeing 2346 break B3.Therefore, can realize the raising of speed change precision constantly.

At this moment, shown in the solenoid valve action schedule of Fig. 4, by first, second is set, the 5th～the 7th solenoid valve SOL1, SOL2, SOL5, SOL6, SOL7 be for connecting, in addition for ending, supply with to the clutch of expectation or break and to connect pressure.

(3 speed)

As shown in Figure 3,3 speed are that connection by 2346 break B3 and low brake B2 and direct clutch C2 obtains.

In this 3 speed, because connect 2346 break B3, so the rotation that is input to the second gear ring R2 from input shaft Input is slowed down by the second planetary pinion G2.The rotation of this deceleration outputs to the 4th gear ring R4 from the first linking member M1.In addition, because connect direct clutch C2, so the rotation of fourth line star gear G4 one.In addition, because connect low brake B2,, export from the third line gear rack PC3 so pass through the third line star gear G3 deceleration through the rotation that the second coupling member M2 is input to the 3rd gear ring R3 from fourth line gear rack PC4 with the rotation of the 4th gear ring R4 one.Like this, fourth line star gear G4 participates in the moment of torsion transmission, but does not participate in decelerating effect.

Promptly, 3 speed are fixed by the wire gauge that the interface of 2346 break B3 of the output speed of geared-down engine and the interface from the low brake B2 of the deceleration rotation of the second planetary pinion G2 of slowing down are linked, and slow down and export from the rotation of input shaft Input input and from output gear Output.

In this 3 speed, torque is in 2346 break B3, low brake B2, direct clutch C2, the first linking member M1, the second linking member M2, the 3rd linking member M3.That is, the second planetary pinion G2 and the second planetary gear set GS2 participate in transmission of torque.

In addition, from 2 speed when 3 speed upgrade, by early release H﹠amp; RL clutch C3 also begins to connect direct clutch C2, discharges the second overrunning clutch F2 in the moment of the connection capacity of guaranteeing direct clutch C2.Therefore, can realize the raising of speed change precision constantly.

At this moment, shown in the solenoid valve action schedule of Fig. 4, by first, second is set, the 4th, the 5th and the 7th solenoid valve SOL1, SOL2, SOL4, SOL5, SOL7 be for connecting, in addition for ending, supply with to the clutch of expectation or break and to connect pressure.

(4 speed)

As shown in Figure 3,4 speed are by 2346 break B3 and direct clutch C2 and H﹠amp; The connection of LR clutch C3 and obtaining.

In this 4 speed, because connect 2346 break B3, so the rotation that is input to the second gear ring R2 from input shaft Input is only slowed down by the second planetary pinion G2.Rotation after this deceleration outputs to the 4th gear ring R4 from the first linking member M1.In addition, because connect direct clutch C2 and H﹠amp; So LR clutch C3 is the rotation of the second planetary gear set GS2 one.Therefore, the rotation that is input to the 4th gear ring R4 is directly exported from the third line gear rack PC3.

In this 4 speed, torque is in 2346 break B3, direct clutch C2, H﹠amp; LR clutch C3, the first linking member M1, the second linking member M2, the 3rd linking member M3.That is, the second planetary pinion G2 and the second planetary gear set GS2 participate in transmission of torque.

At this moment, shown in the solenoid valve action schedule of Fig. 4,, in addition, press to the clutch or the break supply connection of expectation for ending by the second and the 5th solenoid valve SOL1, SOL2, SOL5 being set for connecting.

At this, because the 7th solenoid valve SOL7 is set for ending, so first switching valve SV1 this moment right-hand moving in Fig. 2 with low brake B2 and discharging circuit communication, is communicated with (preventing linkage status) with the second pressure regulator valve CV2 and input clutch C1.In addition, because press,, first mouthful of c1 and the 3rd mouthful of c3 are communicated with at the second switching valve SV2 so left moves in Fig. 2 to four-hole c4 effect D shelves.The 6th pressure regulator valve CV6 is because move the top in Fig. 2, so supply with by the oil pressure of pressure regulation to the 4th switching valve SV4.

There are the D shelves to press at the 4th switching valve SV4 because of effect, so oil circuit 1231 and oil circuit 123 are communicated with.Oil circuit 122 and discharging circuit communication so supply with oil pressure to direct clutch C2, on the other hand, are not supplied with oil pressure to the 3rd switching valve SV3.In addition, the 3rd switching valve SV3 is not because supply with signal pressure so right-hand mobile to Fig. 2 to mouth d4 from the 7th solenoid valve SOL7, on the oil circuit 106c of second mouthful of d2 and the 3rd mouthful of d3 connection, do not supply with the R shelves and press (by manually operated valve MV blocking), so do not supply with oil pressure to reversing break B4.

(5 speed)

As shown in Figure 3,5 speed are by input clutch C1 and direct clutch C2 and H﹠amp; The connection of LR clutch C3 and obtaining.

In this 5 speed, because connect input clutch C1, so the rotation of input shaft Input is input to the second linking member M2.In addition, because connect direct clutch C2 and H﹠amp; LR clutch C3, so, the rotation of the third line star gear G3 one.Therefore, the rotation of input shaft Input is directly exported from the third line gear rack PC3.

In this 5 speed, torque is in input clutch C1, direct clutch C2, H﹠amp; LR clutch C3, the second linking member M2.That is, only the third line star gear G3 participates in transmission of torque.

At this moment, shown in the solenoid valve action schedule of Fig. 4,, supply with the connection pressure to the clutch or the break of expectation by all solenoid valve SOL1～SOL7 being set for ending.

(6 speed)

As shown in Figure 3,6 speed are by input clutch C1 and H﹠amp; The connection of LR clutch C3 and 2346 break B3 and obtaining.

In this 6 speed, because connect input clutch C1, so the rotation of input shaft Input is imported into second gear ring and is input to the second coupling member M2.In addition, because connect 2346 break B3, so, export to the 4th gear ring R4 from the first coupling member M1 by the rotation that the second planetary pinion G2 slows down.In addition, because connect H﹠amp; LR clutch C3 is so the second planetary gear set GS2 exports the rotation of the 4th gear ring and the rotation of being stipulated by the rotation of the second coupling member M4 from the third line gear rack PC3.

In this 6 speed, torque is in input clutch C1, H﹠amp; LR clutch C3,2346 break B3, the first linking member M1, the second linking member M2, the 3rd linking member M3.That is, the second planetary pinion G2 and the second planetary gear set GS2 participate in transmission of torque.

At this moment, shown in the solenoid valve action schedule of Fig. 4, by the 5th and the 6th solenoid valve SOL5, SOL6 being set for connecting, other solenoid valve SOL1, SOL2, SOL3, SOL4, SOL7 press to the clutch or the break supply connection of expectation for ending.

(7 speed)

As shown in Figure 3,7 speed are by input clutch C1 and H﹠amp; The connection of LR clutch C3 and front brake B1 (the first overrunning clutch F1) and obtaining.

In this 7 speed, because connect input clutch C1, so the rotation of input shaft Input is input to second gear ring and is input to the second coupling member M2.In addition, because connect front brake B1, so, export to the 4th gear ring R4 from the first coupling member M1 by the rotation that the first planetary gear set GS1 slows down.In addition, because connect H﹠amp; LR clutch C3 is so the second planetary gear set GS2 exports the rotation of the 4th gear ring R4 and the rotation of being stipulated by the rotation of the second coupling member M4 from the third line gear rack PC3.

In this 7 speed, torque is in input clutch C1, H﹠amp; LR clutch C3, front brake B1, the first linking member M1, the second linking member M2, the 3rd linking member M3.That is, the first planetary gear set GS1 and the second planetary gear set GS2 participate in transmission of torque.

At this moment, shown in the solenoid valve action schedule of Fig. 4, by the 3rd and the 6th solenoid valve SOL3, SOL6 being set for connecting, other solenoid valve SOL1, SOL2, SOL4, SOL5, SOL7 press to the clutch or the break supply connection of expectation for ending.

(retreating)

As shown in Figure 3, retreating is to pass through H﹠amp; The connection of LR clutch C3 and front brake B1 and reversing break B4 and obtaining.

In this retreats, because connect front brake B1, so, export to the 4th gear ring R4 from the first coupling member M1 by the rotation that the first planetary gear set GS1 slows down.In addition, because connect H﹠amp; LR clutch C3 connects reversing break B4, and rotation regulation is exported from the third line gear rack PC3 so the second planetary gear set GS2 is with the rotation of the 4th gear ring R4 with by the fixing of the second coupling member M2.

That is, retreating is the front brake B1 that will make the output rotational delay of motor by the first planetary gear set GS1, the reversing break B4 that fixes the rotation of the second linking member M2, the H﹠amp that constitutes the second planetary gear set GS2; The wire gauge that the interface of LR clutch C3 links is fixed, will slow down in opposite direction from the rotation of input shaft Input input, and export from output gear Output.

Torque flow in this retreats is that torque is in H﹠amp; LR clutch C3, front brake B1, reversing break B4, the first linking member M1, the second linking member M2, the 3rd linking member M3.That is, the first planetary gear set GS1 and the second planetary gear set GS2 participate in transmission of torque.

At this moment, shown in the solenoid valve action schedule of Fig. 4, by second, third and the 6th solenoid valve SOL2, SOL3, SOL6 being set for connecting, other solenoid valve SOL1, SOL4, SOL5, SOL7 be for ending, and supplies with to the clutch of expectation or break to connect pressure.In addition, be made as connection at the R shelves switching initial stage, be made as after connection finishes and end for the 7th solenoid valve SOL7.

At reversing break B4, supply with the R shelves through the 3rd switching valve SV3 and press.At the R shelves because there is not special-purpose pressure regulator valve, so at the connection initial stage, the connection of using employed the 6th pressure regulator valve CV6 of direct clutch C2 to regulate reversing break B4 is pressed.At first, when switching to R shelves pressure by manually operated valve MV, second switching valve SV2 right in Fig. 2 moves, and supplies with the R shelves to the 6th pressure regulator valve CV6 and presses.In addition, the 4th switching valve SV4 left in Fig. 2 moves, and oil circuit 121 and oil circuit 122 are communicated with.Thus, the oil pressure of regulating by the 6th pressure regulator valve CV6 is input to oil circuit 122.

Under this state, when the 7th solenoid valve SOL7 was set for connection, the 3rd switching valve SV3 left in Fig. 2 moved, and oil circuit 122 and oil circuit 130 are communicated with.Therefore,, control the connection of reversing break B4 by the oil pressure of regulating according to the 6th pressure regulator valve CV6 and press for during connecting at the 7th solenoid valve SOL7.When connecting end, the 7th solenoid valve SOL7 is set for ending.So the 3rd switching valve SV3 is right-hand moving in Fig. 2, oil circuit 106c and oil circuit 130 are communicated with, therefore, directly import the R shelves and press, keep coupled situation.

Like this, by the 3rd switching valve SV3 and the 4th switching valve SV4 are set, can press by the connection of 12 clutch of pressure regulator valve control or break.

This common 7 fast gearshift map is a characteristic for example shown in Figure 5, the vehicle velocity V sp that will calculate based on OSS 5 and divide the speed change zone as parameter by the gas pedal aperture APO that engine load sensor 1 obtains is when upgrade line or carry out when lowering category line and upgrade or lower category of crosscut.

Then, the control of the locking of the hydraulic pitch device TC of the automatic transmission of the present embodiment of formation like this is described.

ATCU20 obtains the operating condition of vehicle, judges that based on this operating condition the lock-up clutch LUC of hydraulic pitch device TC is any of coupled situation and non-coupled situation.Then, control the coupled situation of the lock-up clutch LUC of hydraulic pitch device TC based on this judged result.

Particularly, ATCU20 obtains the vehicle velocity V sp as operating condition.The locking regional determination speed of a motor vehicle that dotted line is represented in the gearshift map of this vehicle velocity V sp and Fig. 5 (the SlipL/U regional determination speed of a motor vehicle) relatively.

Being judged to be under vehicle velocity V sp is situation more than the locking regional determination speed of a motor vehicle is the locking zone, and ATCU20 is controlled to be coupled situation with lock-up clutch LUC.On the other hand, be that to be judged to be under the situation of the not enough locking regional determination speed of a motor vehicle be bending moment (T/C) zone at vehicle velocity V sp, ATCU20 is controlled to be releasing state with lock-up clutch LUC.

Like this, ATCU20 is that coupled situation still is the judgment standard (the SlipL/U regional determination speed of a motor vehicle) of releasing state by the lock-up clutch LUC of the locking of storage decision in advance hydraulic pitch device TC, and constitutes storage device.

In addition, in the present embodiment, the coupled situation of lock-up clutch LUC also contains difference with the input speed of hydraulic pitch device TC and output speed and is controlled at the sliding latch of (for example counting 10rpm) in the predetermined range (below, also be designated as " SlipL/U ").

According to such control, control the coupled situation of the lock-up clutch LUC of hydraulic pitch device TC based on the operating condition of vehicle.

Like this, in the present embodiment, the determinating reference that lock-up clutch LUC is a coupled situation (speed of a motor vehicle) is set and that the determinating reference that lock-up clutch LUC is releasing state (speed of a motor vehicle) is set is identical, therefore, the attachment areas of lock-up clutch LUC enlarges, and reduces fuel consume.

Yet, when setting in this wise, under near situation about resisting this determinating reference, the vibration that adjusts disorderly that the ON/OFF of the connection of lock-up clutch LUC, non-connection carries out continually repeatedly may take place in the operating condition of vehicle.

Therefore, in the present embodiment, control, suppress to adjust disorderly the generation of vibration by mode with following explanation.

Fig. 6 is the flow process of the control of the lock-up clutch LUC that carries out of the ATCU20 of present embodiment.

This flow process was carried out in the ATCU20 cycle (for example every 10ms) in accordance with regulations.

After the processing of this flow process began, ATCU20 obtained the relevant data (S101) of operating condition of present vehicle.Particularly, obtain information from first turbine speed sensor 3, second turbine speed sensor 4, OSS 5, Circuit breaker 6 etc.In addition, obtain gas pedal aperture APO, engine speed N etc. from ECU10.

ATCU20 is based on obtain the data relevant with later control (vehicle velocity V sp, gas pedal aperture APO) from the signal value of these each sensors.That is, ATCU20 constitutes vehicle speed detector device by detecting speed of a motor vehicle Vsp based on the value that obtains from above-mentioned each sensor.

Then, ATCU20 is with reference to the speed change figure (Fig. 5) of storage in advance, and whether the vehicle velocity V sp that judgement obtains in attachment areas, that is, whether vehicle velocity V sp is more than the SlipL/U regional determination speed of a motor vehicle (S102).

Like this, ATCU20 constitutes decision maker by being that speed change figure, the judgement friction element that the SlipL/U regional determination speed of a motor vehicle is set is that lock-up clutch LUC is coupled situation or releasing state based on vehicle velocity V sp and determinating reference.

Result of determination enters step S103 under the situation of judging the not enough SlipL/U regional determination of the vehicle velocity V sp speed of a motor vehicle.Being judged to be vehicle velocity V sp under the situation more than the SlipL/U regions judgement speed of a motor vehicle, enter step S109.

At step S103, ATCU20 judges whether the regional determination result of last time is the SlipL/U zone.In addition, the result who judges in the preceding control of once carrying out (step S104, S105, S110, S117) of the determinating area of last time for the control of this flow process.

The result of determination of last time (T/C zone) not under the situation in SlipL/U zone enters step S104.The result of determination of last time enters step S105 in the situation in SlipL/U zone.

At step S104, the not enough SlipL/U regional determination of the present vehicle velocity V sp speed of a motor vehicle, and the result of determination of last time is also in the T/C zone, so ATCU20 then is judged to be the bending moment zone.

Afterwards, enter step S107, judge whether the time-delay of SlipL/U regional determination begins.The time-delay of this SlipL/U regional determination is after lock-up clutch LUC described later discharges, and the time that is used to suppress to adjust disorderly vibration for measurement uses.

Under the situation that the time-delay of SlipL/U regional determination has begun, ATCU20 adds 1 by SlipL/U regional determination delayer to be counted end and upgrades (S108).Afterwards, the temporary transient processing that finishes according to this flow process.In the situation that the time-delay of SlipL/U regional determination does not begin, the directly temporary transient processing that finishes according to this flow process.

At step S103, the result of determination that is judged to be last time is under the situation in SlipL/U zone, in step 105, because the not enough SlipL/U regional determination of the present vehicle velocity V sp speed of a motor vehicle, so ATCU20 is judged to be the T/C zone.

Then, at step S106, ATCU20 carries out and follows from the initialization process of SlipL/U zone to the T/C regional change.

At this, after step S105 is altered to the T/C zone from the SlipL/U zone, when perhaps being altered to the SlipL/U zone, adjust disorderly vibration at once.

Therefore, in the present embodiment, adjust disorderly vibration, under the invalid situation of defined terms, even for example vehicle velocity V sp judges more than the speed of a motor vehicle also not to the change of SlipL/U zone for the SlipL/U field in order to prevent.In this step S106, set the initial value that is used to judge this defined terms establishment.

ATCU20 makes SlipL/U regional determination time-delay beginning.Whether in addition, be stored in gas pedal aperture APO, the gas pedal aperture APO that step S101 obtains respectively is full cut-off, vehicle velocity V sp.

Then, enter step S107, judge whether the time-delay of SlipL/U regional determination begins.In addition, after the processing of step S106, enter under the situation of step S107, begin because the SlipL/U regional determination is delayed time, so, enter step S108 and SlipL/U regional determination time-delay counting is finished.Afterwards, the temporary transient processing that finishes according to this flow process.

Being judged to be vehicle velocity V sp at step S102 is under the situation more than the SlipL/U regional determination speed of a motor vehicle, enters step S109.

At step S109, ATCU20 judges whether the result of the regional determination of last time is the T/C zone.In addition, the determinating area of last time is the preceding once result of determination of the control of execution according to the control of this flow process.

The result of determination of judging last time is not under the situation in T/C zone, and the result of determination that promptly is judged to be last time is to enter step S110 under the situation in SlipL/U zone.

At step S110, present vehicle velocity V sp is more than the SlipL/U regional determination speed of a motor vehicle, and the result of determination of last time also is the SlipL/U zone, and therefore, ATCU20 then is judged to be the SlipL/U zone.

Afterwards, enter step S107, if the time-delay of SlipL/U regional determination begins, then ATCU20 makes SlipL/U regional determination time-delay counting finish (S108).Afterwards, the temporary transient processing that finishes according to this flow process.Under the situation that the time-delay of SlipL/U regional determination does not begin, the directly temporary transient processing that finishes according to this flow process.

At step S109, be under the situation in T/C zone in the result who judges last time, enter step S111.

At step S111, judge whether the time-delay of SlipL/U regional determination begins.

Under the situation that the time-delay of SlipL/U regional determination has begun, enter step S112.Under the situation that the time-delay of SlipL/U regional determination does not begin, enter step S110.

At this step S111, the result of determination of last time is the T/C zone, is situation more than the SlipL/U regional determination speed of a motor vehicle but be judged to be vehicle velocity V sp at step S102.At this, under the situation that the time-delay of SlipL/U regional determination has begun, be the initialization process of execution in step S106, after the processing of temporary transient process ends, the state that begins the processing of this flow process once more.

In this case, result of determination last time is the SlipL/U state, and the result of determination of last time is judged to be the T/C state in step S105.Therefore, afterwards,, become when at once being set at the SlipL/U state and adjust disorderly vibration based on vehicle velocity V sp.

Therefore, present embodiment only under the situation of at least one establishment of the rated condition of step S112～step S115 regulation, just is set at the SlipL/U state.Under the invalid situation of defined terms, even judge that vehicle velocity V sp is more than the SlipL/U regional determination speed of a motor vehicle, also not entering SlipL/U, still is the T/C state.

The defined terms of this enforcement state finishes the above variation (S114) of the established amount of variation (S113), gas pedal aperture APO of full cut-off/non-full-shut position of (S112), gas pedal aperture APO, the above variation (S115) of established amount of vehicle velocity V sp for SlipL/U regional determination time-delay.In these defined terms under the situation of at least one establishment, be judged to be and adjust disorderly vibration and do not take place, be altered to the SlipL/U zone.

In step S112, ATCU20 judges whether the time-delay of SlipL/U regional determination is more than the specified value.,, enter step S110 and be set at the SlipL/U state under promptly the SlipL/U regional determination is delayed time situation about having finished under the situation more than the specified value in the time-delay of SlipL/U regional determination.Under the SlipL/U regional determination is delayed time the situation of not enough specified value, enter step S113.

The time-delay of this SlipL/U regional determination is to set the imperceptible time that adjusts disorderly the degree of vibration of driver with becoming from the SlipL/U state behind the T/C state to the time that becomes the SlipL/U state once more as the concluding time.

Common having among grade AT, do not feel that in order to make the driver gear shift is frequent, be controlled to be, after the speed change to the time of speed change is (for example 2 seconds) more than the specific time interval once more.By will equally setting according to stipulated time and this specific time interval that the SlipL/U regional determination time-delay of present embodiment is judged, thus, can be so that the driver feel that the mode that adjusts disorderly vibration controls the connection of hydraulic pitch device TC, the switching of non-connection.

At step S113, ATCU20 judges whether the state of gas pedal changes.More specifically, judge that the state of gas pedal changes to full-shut position from non-full-shut position, perhaps change to non-full-shut position from full-shut position.Under the situation of the change of state of judging gas pedal, enter step S110 and be set at the SlipL/U state.Enter step S114 under the situation that does not have to change at the state of judging gas pedal.

The driver regulates the aperture of gas pedal, speed, the acceleration of control car two.Because have a mind to operate under the situation of gas pedal the driver, its result can predict the variation of action of the vehicle of generation, so, with operation unintentionally relatively, the permissibility that adjusts disorderly vibration becomes big.

In this step, carry out lifting pin or depressing of gas pedal by the driver, be judged to be under the situation of the operation of having a mind to carry out gas pedal, adjust disorderly vibration even control becomes from lifting the pin state, because driver's permissibility is big, so also be set at the SlipL/U zone at once.

In addition, establishing under the situation that gas pedal is a full cut-off, having a mind to carry out the situation of engine braking for the driver, the situation that depresses gas pedal from full cut-off is to have a mind to quicken and keep the situation of speed, therefore, be coupled situation by setting lock-up clutch energetically, can reduce fuel consume.

At step S114, ATCU20 judges that the variable quantity of gas pedal aperture APO is whether more than established amount.In addition, the absolute calculation of the difference of the gas pedal aperture APO that obtains among the step S101 of the gas pedal aperture APO that from step S106, stores of the variable quantity of gas pedal aperture APO and this control according to the control of the flow process of last time.

Under the situation more than the established amount, enter step S110 at the variable quantity that is judged to be gas pedal aperture APO, be set at the SlipL/U state.Under the situation of the not enough established amount of the variable quantity of gas pedal aperture APO, enter step S115.

S114 is identical with above-mentioned steps, has a mind to operate under the situation of gas pedal the driver, and the permissibility that adjusts disorderly vibration is big.Therefore, under the big situation of the operation amount of gas pedal, promptly, the variable quantity of gas pedal aperture APO is under the situation more than the established amount (for example 1/8 aperture), even becoming, control adjusts disorderly vibration, because driver's permissibility is big, so also be set at the SlipL/U zone.

In addition, under the big situation of gas pedal aperture APO variable quantity, the driver has a mind to quicken or slow down energetically, so, be coupled situation by setting lock-up clutch energetically, can reduce fuel consume.

At step S115, ATCU20 judges that the variable quantity of vehicle velocity V sp is whether more than established amount.In addition, the absolute calculation of the difference of the vehicle velocity V sp that obtains among the step S101 of the vehicle velocity V sp that from step S106, stores of the variable quantity of vehicle velocity V sp and this control according to the control of the flow process of last time.

, under the situation more than the established amount, enter step S110 and be set at the SlipL/U state at the variable quantity of judging vehicle velocity V sp.Situation at the not enough established amount of the variable quantity of vehicle velocity V sp enters step S116.

The variation of vehicle velocity V sp also brings driver's the acceleration intention or the result of deceleration intention.Thereby, the driver have a mind to quicken energetically or the situation of slowing down under to adjust disorderly the permissibility of vibration big.Therefore, big and under the situation more than the established amount at the variable quantity of vehicle velocity V sp, even becoming, control adjusts disorderly vibration, because driver's permissibility is big, so also be set at the SlipL/U zone.

In addition, such as existing patent documentation 1 record, in order to prevent to adjust disorderly vibration, the decision content of connection/non-connection of lock-up clutch LCU is set hysteresis.In addition, hysteresis is also set in the change of the speed change level of step change transmission.This hysteresis is generally about 3km/h.Big specified value and this hysteresis of variable quantity of vehicle velocity V sp by will being used to be judged as present embodiment equally set, can be so that the driver does not feel that the mode that adjusts disorderly vibration controls the connection of hydraulic pitch device TC, non-connection.

Under any one also invalid situation of the defined terms that defines in the control of judging these steps S112～S115, enter step S116, the result of the regional determination of last time is kept in the ATCU20 decision.This result is that ATCU20 is judged to be the T/C zone at step S117.

As mentioned above, by the control of this flow process, does not reduce fuel consume by the switching of the connection of the lock-up clutch LUC of hydraulic pitch device TC, non-connection is not established to lag behind, and can reduce by adjusting disorderly the discomfort of vibration band to the driver.

In addition, in the flow process of this Fig. 6, ATCU20 determines that in step S104～S110 and S117 lock-up clutch LUC is coupled situation or releasing state, constitutes to connect control gear.

In addition, in the flow process of this Fig. 6, under the invalid situation of the defined terms of ACT20 in step S112～S115, forbidding setting lock-up clutch LUC in step S116 and S117 is coupled situation, constitutes inhibiting apparatus thus.

Fig. 7 is the time diagram that carries out the control of lock-up clutch LUC according to the ATCU20 of present embodiment.

This time diagram is from the comparative result of the variable quantity of the comparative result of the variable quantity of the variation of the last state of representing lock-up clutch LUC respectively, gas pedal aperture APO, gas pedal aperture APO and specified value, vehicle velocity V sp and specified value, gas pedal state, the state of SlipL/U condition judgement time-delay, the variation of gas pedal aperture APO, the variation of vehicle velocity V sp.

At first, the state of lock-up clutch LUC (command value) is the T/C state.

At this, vehicle velocity V sp rises, at moment t1, ATCU20 judges that vehicle velocity V sp is under the above situation of the SlipL/U regional determination speed of a motor vehicle (among the step S102 of Fig. 6 " YES "), owing to judge that the regional determination of last time is T/C (among the step S109 " YES "), the time-delay of SlipL/U regional determination does not also begin (step S111 " NO "), so enter step S110, is judged to be the SlipL/U state.

Afterwards, vehicle velocity V sp descends, at moment t2, ATCU20 judges that vehicle velocity V sp is (among the step S102 of Fig. 6 " NO ") under the situation of the not enough SlipL/U regional determination speed of a motor vehicle, because being judged to be the regional determination of last time is SlipL/U (among the step S103 " YES "), so enter step S105, be judged to be the T/C state.

Next, the initialization of ATCU20 execution in step S106 control makes SlipL/U regional determination time-delay beginning.In addition, be stored in gas pedal state, gas pedal aperture APO, the vehicle velocity V sp that this moment t2 is ordered respectively.

Afterwards, the speed of a motor vehicle rises once more, at moment t3, ATCU20 judges that vehicle velocity V sp is under the above situation of the SlipL/U regional determination speed of a motor vehicle (among the step S102 " YES "), because being judged to be the regional determination of last time is T/C (among the step S109 " YES "), the time-delay of SlipL/U regional determination begins (step S111 " YES "), so ATCU20 judges from the step S112 of Fig. 6 whether set up to the rated condition of S115 regulation.

At step S112, ATCU20 judges whether the time-delay of SlipL/U regional determination finishes.The moment at moment t3 does not finish, so negate this condition.

At step S113, ATCU20 judges whether the state of gas pedal changes to full-shut position.The state of gas pedal does not change in the moment of moment t3, so negate this condition.

At step S114, ATCU20 judges that the variable quantity of gas pedal aperture APO is whether more than specified value.At the not enough specified value of variable quantity of the moment of moment t3 gas pedal aperture APO, so negate this condition.

At step S115, ATCUA20 judges that the variable quantity of vehicle velocity V sp is whether more than specified value.At the not enough specified value of variable quantity of the moment of moment t3 vehicle velocity V sp, so negate this condition.

This result is to be false in these defined terms of the moment of moment t3, even vehicle velocity V sp is that ATCU20 still keeps the T/C zone more than the SlipL/U regional determination speed of a motor vehicle.

After, at vehicle velocity V sp is (step S102 " YES ") more than the SlipL/U regional determination speed of a motor vehicle, the regional determination of last time is T/C (step S109 " YES "), SlipL/U declares in the zone under the situation that time-delay begins (step S111 " YES "), and ATCU20 judges repeatedly from the step S112 of Fig. 6 whether set up to the rated condition of S115 regulation.During this time, by the processing of step S107 and S108, SlipL/U regional determination time-delay counting is finished.

And, at moment t4, under the situation of at least one establishment of the rated condition of step S112～S115 regulation (at this, the time-delay of SlipL/U regional determination finishes, among the step S112 by certainly), enter step S110, enter the SlipL/U zone.

Like this, lock-up clutch LUC from the SlipL/U state transitions behind the T/C state, when transferring to the SlipL/U state once more, so that the driver does not feel that the mode that adjusts disorderly vibration controls.

As above, in first mode of execution of the present invention, it is identical that the lock-up clutch LUC that judges hydraulic pitch device TC is that the reference value of the reference value of coupled situation (SlipL/U) and the non-coupled situation of judgement (T/C) is set at, and do not set hysteresis.By setting in this wise, can enlarge the zone of setting coupled situation more, can reduce fuel consume.

In addition, lock-up clutch LUC from coupled situation when releasing state change, store car state (state of gas pedal, gas pedal aperture APO and vehicle velocity V sp), afterwards, become in reference value under the situation of attachment areas, the relatively state of Cun Chu vehicle and the state of vehicle now only under the situation that defined terms is set up, become coupled situation once more.By such setting, can reduce the discomfort that vibration band is given the driver that adjusts disorderly of control that repetition coupled situation and non-coupled situation cause.

(second mode of execution)

Then, second mode of execution is described.

In the first embodiment, constitute, after coupled situation is set to releasing state, only under the situation that defined terms is set up, allow to connect once more at lock-up clutch LUC.Relative with it, in mode of execution 2, constitute, detect the acceleration of vehicle, based on this Acceleration Control coupled situation.

In addition, because the basic comprising of second mode of execution is identical with first mode of execution, so omit its explanation.

Fig. 8 is the flow process that ATCU20 second embodiment of the invention carries out the control of lock-up clutch LUC.

Identical with above-mentioned first mode of execution, this flow process was carried out according to the cycle (for example 10ms) of the regulation of ATCU20.

After the processing of this flow process began, ATCU20 obtained the relevant data (rotating speed of vehicle velocity V sp, driver aperture APO, each speed probe etc.) of the operating condition of present vehicle (S201).

ATCU20 calculates the acceleration a (S202) of the vehicle of now based on these from the signal value of each sensor.That is, ATCU20 is by constituting acceleration detecting based on the value sense acceleration a that obtains from above-mentioned each sensor.

ATCU20 judges that the acceleration a calculate is whether more than specified value.Be judged to be under the situation more than the specified value, enter step S220, be judged to be under the situation of not enough specified value, enter step S204.

As described at first mode of execution, have a mind to operate under the situation of gas pedal governing speed and acceleration the driver, consequently because can predict the state of movement of the vehicle of generation, so and the operation of not having an intention relatively, the permissibility that adjusts disorderly vibration becomes big.

In second mode of execution, the result of such driver's operation is, being judged to be under the very large situation of acceleration, do not carry out the judgement whether defined terms is set up, and only the connection of carrying out lock-up clutch LUC based on the speed of a motor vehicle is judged.

Particularly, in step S203, under the acceleration a that is judged to be vehicle is situation more than the specified value, enter step S220, judge that vehicle velocity V sp is whether more than the SlipL/U regional determination speed of a motor vehicle.

In the travelling state of common attention fuel consume, the acceleration when particularly starting to walk is 0.1G (G=0.9m/s2).Therefore whether enough big, the specified value by degree of will speed up a is set at 0.1G, can carry out acceleration judgement.

Judging that vehicle velocity V sp is under the situation of the not enough SlipL/U regional determination speed of a motor vehicle, enter step S221, ATCU20 is judged to be the T/C zone.Judging that vehicle velocity V sp is under the situation more than the SlipL/U regional determination speed of a motor vehicle, enter step S222, ATCU20 is judged to be the SlipL/U zone.

Afterwards, the temporary transient control that finishes according to this flow process.

In addition, at step S203, under the situation that is judged to be the not enough specified value of wagon accelerator a, enter step S204.Control between this step S204～step S219 is because of identical with first mode of execution, so omit explanation.

Fig. 9 is the time diagram that second ATCU20 that implements this mode carries out the control of lock-up clutch LUC.

This time diagram is from the last state of representing lock-up clutch LUC respectively, gas pedal state, the state of SlipL/U condition judgement time-delay, the state of acceleration a, the variation of gas pedal aperture APO, the variation of vehicle velocity V sp.

At first, the state of lock-up clutch LUC (command value) is the T/C state.

At this, vehicle velocity V sp rises, at moment t1, judging that accelerator a is under the state (among the step S203 of Fig. 8 " NO ") of not enough specified value, under the situation more than vehicle velocity V sp is the SlipL/U regional determination speed of a motor vehicle (among the step S204 " YES "), ATCU20 judges that the regional determination of last time is T/C (among the step S211 " YES "), the time-delay of SlipL/U regional determination does not also begin (step S213 " NO "), so, enter step S212, be judged to be the SlipL/U state.

Afterwards, vehicle velocity V sp descends, at moment t2, at accelerator a is under the state (among the step S203 " NO ") of not enough specified value, under the situation (among the step S20 " NO ") of the not enough SlipL/U regional determination of the vehicle velocity V sp speed of a motor vehicle, ATCU20 judges that the regional determination of last time is SlipL/U (among the step S205 " YES "), so, enter step S207, be judged to be the T/C state.

Next, the initialization of ATCU20 execution in step S208 control.

Afterwards, the speed of a motor vehicle rises once more, at moment t3, at accelerator a is the state (among the step S203 of Fig. 8 " NO ") of not enough specified value, under the situation more than vehicle velocity V sp is the SlipL/U regional determination speed of a motor vehicle (among the step S20 " YES "), ATCU20 judges that the regional determination of last time is T/C (among the step S211 " YES "), and the time-delay of SlipL/U regional determination begins (step S213 " YES "), so whether the defined terms of ATCU20 determination step S214～S217 regulation is set up.

In the example of this Fig. 9, because in the moment of moment t3, these defined terms are false, therefore, even vehicle velocity V sp more than the SlipL/U regional determination speed of a motor vehicle, ATCU20 still keeps the T/C zone.

Afterwards, at moment t4, when judging that acceleration a is specified value when above (among the step S203 " YES "), whether ATCU20 is more than the SlipL/U regional determination speed of a motor vehicle based on vehicle velocity V sp only, and the connection that is used for lock-up clutch is judged.

At this, when judging that vehicle velocity V sp is (step S220 " YES ") more than the SlipL/U regional determination speed of a motor vehicle, enter step S222, transfer to the SlipL/U zone.

Like this, lock-up clutch LUC from the SlipL/U state transitions after go into the T/C state, when transferring to the SlipL/U state once more, the size by degree of will speed up a is used for judging, so that the driver does not feel that the mode that adjusts disorderly vibration and reduce fuel consume controls.

As mentioned above, in second mode of execution of the present invention, constitute, on the basis of described first mode of execution, degree of will speed up is used to judge the lock-up clutch LUC of connection/release hydraulic pitch device TC.By such setting, on the basis of the effect of the first above-mentioned mode of execution, under the enough big situation of the acceleration of vehicle, do not carry out the judgement whether rated condition is set up, only judge according to the speed of a motor vehicle, therefore, can enlarge attachment areas, can realize simultaneously reducing fuel consume and reduction adjust disorderly the vibration the two.

Especially, under the enough big situation of acceleration, because operating condition is stagnated near not existing in the speed of a motor vehicle of regulation, so it is little to adjust disorderly the possibility of vibration.Therefore, under the situation of such running transition, there is no need to carry out the control that is used to prevent to adjust disorderly vibration.Therefore, under the enough big situation of acceleration,, can prevent the delay controlled, can quicken lock-up clutch LUC and shift, can make the reduction fuel consume to coupled situation by not carrying out the judgement of rated condition.

In addition, in above-mentioned first and second mode of execution, being that example is illustrated with the automatic transmission of 7 speed, but being not limited to this, also can be other step change transmission.In addition, also can be used for the variable v-belt drive of belt wheel clamping band or chain etc. or ring type (loopful, the semi-ring) stepless speed changing mechanism of input output dish clamping live roll.

The invention is not restricted to above-mentioned mode of execution, certainly, be also contained in various changes, the improvement carried out in its technological thought scope.

Claims

1. the control gear of an automatic transmission based on the speed of a motor vehicle and engine load target setting speed change level, is characterized in that possessing hydraulic pitch device in described automatic transmission,

The control gear of described automatic transmission possesses:

Vehicle speed detector device, it detects the speed of a motor vehicle;

Storage device, its storage judges that the friction element of the described hydraulic pitch device of locking is that coupled situation still is the determinating reference of releasing state;

Decision maker, it is to judge under the situation more than the described determinating reference that described friction element is a coupled situation in the described speed of a motor vehicle, judges that under the situation of the not enough described determinating reference of the described speed of a motor vehicle described friction element is releasing state;

Connect control gear, its result of determination based on described decision maker connects or discharges the control of described friction element,

Described connection control gear has inhibiting apparatus, with described friction element after coupled situation controls to releasing state, regardless of described result of determination, before rated condition was set up, this inhibiting apparatus forbade that described friction element is a coupled situation.

2. the control gear of automatic transmission according to claim 1 is characterized in that, described connection control gear after coupled situation controls to releasing state during through the stipulated time, judges that described rated condition sets up with described friction element.

3. the control gear of automatic transmission according to claim 1, it is characterized in that, described connection control gear with described friction element after coupled situation controls to releasing state, the aperture of gas pedal becomes full-shut position or when full-shut position becomes non-full-shut position from non-full-shut position, judges that described rated condition sets up.

4. the control gear of automatic transmission according to claim 1, it is characterized in that, described connection control gear with described friction element after coupled situation controls to releasing state, the variable quantity of gas pedal aperture changes the regulation aperture when above, judges that described rated condition sets up.

5. the control gear of automatic transmission according to claim 1, it is characterized in that, described connection control gear with described friction element after coupled situation controls to releasing state, the variable quantity of the speed of a motor vehicle changes the regulation speed of a motor vehicle when above, judges that described rated condition sets up.

6. as the control gear of automatic transmission as described in each in the claim 1～5, it is characterized in that,

The acceleration detecting that possesses the acceleration that detects described vehicle,

At detected acceleration is that described connection control gear does not carry out the judgement according to the establishment of the rated condition of described inhibiting apparatus, and permits that based on described result of determination described friction key element is a coupled situation under the situation about stipulating more than the acceleration.